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64 Section 4: Additional Financial Functions
File name: hp 12c_user's guide_English_HDPMBF12E44 Page: 64 of 209
Printered Date: 2005/7/29 Dimension: 14.8 cm x 21 cm
The complex mathematical characteristics of the IRR computation have an
additional ramification: Depending on the magnitudes and signs of the cash flows,
the computation of IRR may have a single answer, multiple answers, a negative
answer or no answer.
*
For additional information regarding
L
, refer to Appendix B. For an alternative
method of calculating IRR, refer to Section 13.
Reviewing Cash Flow Entries
z To display a single cash flow amount, press :, then key in the number of
the register containing the cash flow amount to be displayed. Alternatively,
store the number of that cash flow amount (that is, the value of j for the CF
j
desired) in the n register, then press :gK.
z To review all the cash flow amounts, press :g K repeatedly. This
displays the cash flow amounts in reverse order — that is, beginning with the
final cash flow and proceeding to CF
0
.
z To display the number of times a cash flow amount occurs consecutively —
that is, to display the N
j
for a CF
j
— store the number of that cash flow
amount (that is, the value of j) in the n register, then press :ga.
z To review all the cash flow amounts together with the number of times each
cash flow amount occurs consecutively (that is, to review each CF
j
and N
j
pair), press :ga:gK repeatedly. This displays N
j
followed by
CF
j
beginning with the final cash flow amount and proceeding to N
0
and
CF
0
.
Note: Neither L nor l change the number in the n register. However,
each time :gK is pressed, the number in the n register is decreased
by 1. If this is done, or if you manually change the number in the n register
in order to display a single N
j
and/or CF
j
, be sure to reset the number in the
n register to the total number of cash flow amounts originally entered (not
including the amount of the initial investment CF
0
). If this is not done, NPV
and IRR calculations will give incorrect results; also, a review of cash flow
entries would begin with N
n
and CF
n
, where n is the number currently in the
n register.
For example, to display the fifth cash flow amount and the number of times that
amount occurs consecutively:
Keystrokes Display
:5
9,000.00
CF
5
5n
5.00
Stores the value of j in the
n
register.
*
In the case of multiple answers for IRR, the decision criteria listed on page 57 should be
modified accordingly.